fix(BackToTop): fix null exception on load (#9665)

patternfly · Oct 9, 2023 · d02b802 · d02b802
1 parent 8475a6d
commit d02b802
Showing 1 changed file with 8 additions and 6 deletions.
diff --git a/packages/react-core/src/components/BackToTop/BackToTop.tsx b/packages/react-core/src/components/BackToTop/BackToTop.tsx
@@ -34,12 +34,14 @@ const BackToTopBase: React.FunctionComponent<BackToTopProps> = ({
   const [scrollElement, setScrollElement] = React.useState(null);
 
   const toggleVisible = () => {
-    const scrolled = scrollElement.scrollY ? scrollElement.scrollY : scrollElement.scrollTop;
-    if (!isAlwaysVisible) {
-      if (scrolled > 400) {
-        setVisible(true);
-      } else {
-        setVisible(false);
+    if (scrollElement) {
+      const scrolled = scrollElement.scrollY ? scrollElement.scrollY : scrollElement.scrollTop;
+      if (!isAlwaysVisible) {
+        if (scrolled > 400) {
+          setVisible(true);
+        } else {
+          setVisible(false);
+        }
       }
     }
   };